Preferred Stock [Member] Preferred Stock As Adjusted [Member] Preferred Stock As Further Adjusted [Member] Series E Cumulative Preferred Stock [Member] Series G Cumulative Preferred Stock [Member] Series E Cumulative Preferred Stock As Adjusted [Member] Series G Cumulative Preferred Stock As Adjusted [Member] Series E Cumulative Preferred Stock As Further Adjusted [Member] Series G Cumulative Preferred Stock As Further Adjusted [Member] Common Stock [Member] Common Stock As Adjusted [Member] Common Stock As Further Adjusted [Member] Purchase Transactions [Member] Sale Transactions [Member] Dividends On Preferred Shares Not Included [Member] Purchase At A Premium To Net Asset Value [Member]